高精度风雨模拟环境下拉索风雨激振试验研究新发现  

Experimental study of rain and wind induced vibration of stay cables using high precision rain simulation system

作　　者：许林汕[1] 葛耀君[1] 赵林[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《土木工程学报》2011年第5期86-93,共8页China Civil Engineering Journal

基　　金：国家自然科学基金重点项目(90715039);科技部国家重点实验室基础研究项目(SLDRCE08-C-02)

摘　　要：拉索风雨激振是一种在风雨共同作用下发生的拉索大幅低频振动,现有人工降雨风雨激振试验无法准确模拟自然降雨的多种特性,难于实时再现风雨介质耦合环境拉索气动失稳现象。开发高精度人工降雨模拟装置,可对降雨强度进行精细连续调节,较为准确模拟雨滴大小、能量、均匀度等自然降雨的特性,合理地再现风雨联合作用条件下拉索风雨激振过程;系统研究风速、雨量以及风雨联合作用对拉索风雨激振的影响,揭示了拉索在低风速大雨量、高风速小雨量时,风雨激振发生规律和特点。The rain-wind induced vibration（RWIV） with wind effect is a type of vibration of stay cables with large amplitudes.The current artificial rainfall could not simulate the characteristics of natural rainfalls precisely and could not realize the coupling effect in real-time.A high precision artificial raining machine which can precisely simulate the size of droplets,intensity,energy and uniformity of natural rain was developed with a wind tunnel facility.The phenomenon of RWIN of a cable model was successfully re-produced under the condition of rain and wind.The wind speed,rainfall and the coupling effect were systematically investigated.

关 键 词：拉索 风雨激振 人工降雨模拟 风雨耦合作用 

分 类 号：TU311.3[建筑科学—结构工程]